1,721,010 research outputs found
[Power Doppler: physical and constructive principles and comparison with Doppler color].
No full text
Tumori cistici del pancreas. Apporto diagnostico dell'ecografia e della tomografia computerizzata
No full textIntraoperative Findings in Spinal Lesions
No full textUltrasonographic appearance of spinal tumors has been described in few studies until now, and the role of intraoperative ultrasound is not yet well standardized in spinal tumor surgery.
To evaluate the spinal cord, probes with very high frequency (10 MHz or greater) can be used with outstanding spatial and temporal resolution. Before tumor removal, the lesion is identified, measured on axial and sagittal axes and defined as hyperechoic, isoechoic, or hypoechoic. Other characteristics of the lesions are considered: presence of calcifications, cystic/necrotic areas, diffuse or circumscribed appearance, and the relationships with the surrounding anatomical structures. Intraoperative ultrasonographic findings of different spinal tumors, according to histotypes and also to position, with respective pictorial essays are here presented. Intraoperative ultrasound is a valuable tool to detect spinal lesions, evaluate the surgical approach, and plan the surgical strategy, considering the position and relationships of the lesion with bony, neural, and vascular structures
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
- …
